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Fault
code
Fault description
Explanations/causes
336
Sensor BX22 no function (EM1, EM2 or EM3)
339
Collector pump Q5 missing
341
Collector sensor B6 missing
342
Solar DHW sensor B31 missing
343
Solar interconnection missing
344
Solar actuator buffer K8 missing
345
Solar actuator swimming pool K18 missing
346
Solid fuel boiler pump Q10 missing
347
Solid fuel boil comp sensor missing
348
Solid fuel boiler address error
349
Storage buffer return valve Y15 missing
350
Storage buffer address error
351
Primary controller/supply pump address error
352
Low-loss header address error
353
Common flow sensor B10 missing
371
Flow temperature 3 (Heating circuit 3) monitoring
372
Temperature monitor HK3
373
Expansion module 3 fault (collective fault)
378
Repetition counter internal fault expired
382
Repetition counter fan fault expired
384
External light
385
Mains undervoltage
386
Fan speed has left valid range
387
Air pressure switch fault
426
Feedback flue damper
427
Configuration flue damper
432
Functional earth X17 not connected
(1) Switch off, start prevention, re-start after elimination of fault
(2) Check parameter in accordance with table Check the installer adjustment table and program to the basic settings or query internal LMS
SW diagnosis code and correct the corresponding parameter faults according to fault specification
(3) switch-off and locking; can only be unlocked by reset
11.2 Fault finding
11.2.1 Fault switch-off
Safety switch-off in case of flame failure during operation.
After every safety switch-off a new ignition attempt is carried out as per
program. If this does not result in flame formation a fault switch-off occurs.
In case of fault switch-off, the reset button on the control panel should be
pressed.
In case of operation disturbances (bell symbol in the display), the digit in
the display on the operating panel indicates the cause of the disturbance
(see fault code table).
Burner does not start:
No voltage at the control and regulating centre
No “burner ON” signal from the heating circuit control (see
Fault code ta
ble
)
11 Troubleshooting
136
Paramount four 30 – 115 kW
7658013 - 02 - 15092016